Not the way he does it. The OTHER thread features the "AmpHound" and that seems to work rather well.

But what this guy is doing is problematic for those not experienced in these techniques (the guy in the video knows what he is doing). You do not want to be watching the display of a cheap (or even not so cheap) multimeter on the mV scale with such long leads. Most DMMs today will rectify induced AC on the leads and lead you astray. The "AmpHound" has no leads and is shielded, it is designed to measure voltage drops on the mV scale and to do it accurately.